EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


Horn Park Quarry Ammonites

February 10, 2021

Ammo5

Photographer: Michela Meda
Summary Author: Michela Meda

The fossils seen above are ammonites from Horn Park Quarry,
England. These relatives of the current nautilus thrived for about
140 million years in the Jurassic and Cretaceous Periods.
Ammonites are characterized by a distinctive outer shell composed
mainly of aragonite and conchiolin and internally divided by
septa into different chambers filled with gas and liquid to
control the animal's buoyancy. The animal itself occupied the final
chamber. Horn Park Quarry was once a working quarry and is now the
smallest National Nature Reserve in Britain. Photo taken December 13,
2020.
* Horn Park Quarry National Nature Reserve, England Coordinates:
50.81632, -2.77166

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Geology Links

* Earthquakes
* Geologic Time
* Geomagnetism
* General Dictionary of Geology
* Mineral and Locality Database
* Mohs Scale of Mineral Hardness
* This Dynamic Earth
* USGS
* USGS Ask a Geologist
* USGS/NPS Geologic Glossary
* USGS Volcano Hazards Program

-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

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EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


The Noose of Mars in 2020

June 10, 2021


#01 (6)

Photographer: Paolo Bardelli
Summary Author: Paolo Bardelli

I created the photo sequence above showing Mars movement across the
night sky, centered on October 8, 2020. Photos were taken every night,
clouds permitting, from July 2020 until February 2021. Approximately
every 26 months, Mars passes at its closest distance to Earth. Last
fall the opposition of the Red Planet was particularly
favorable as Mars was at its minimum distance from us -- about 38.5
million miles (62 million km). From our perspective on Earth, when
opposition occurs, Mars performs two reversals of motion, passing from
direct motion to retrograde motion and then back to direct motion.
As a result, its trace across the night sky forms a “noose.” Also,
visible (at top left) is a faint trace left by Uranus’ retrograde
motion.

Photo details: Canon 6D camera; 50 mm lens; Vixen Polarie star-tracker;
processing using Iris, PS CC, Startrails, and Sequator.

Albusciago, Italy Coordinates: 45.7395, 8.7939

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The Noose of Mars in 2020 Comet NEOWISE in July of 2020 The
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Night Sky Links

* Space Weather Live
* Space Weather Live Forum
* About the Moon
* American Meteor Society
* Arbeitskreises Meteore e.V.
* Global City Lights
* Heavens Above Home Page
* The International Meteor Organization
* Lunar and Planetary Institute
* MoonConnection
* NASA Eclipse Web Page
* Understanding The Moon Phases

-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

--- up 4 weeks, 6 days, 12 hours, 15 minutes
* Origin: -=> Castle Rock BBS <=- Now Husky HPT Powered! (21:1/186)

EPOD - a service of USRA

The Earth Science Picture of the Day (EPOD) highlights the diverse processes and phenomena which shape our planet and our lives. EPOD will collect and archive photos, imagery, graphics, and artwork with short explanatory
captions and links exemplifying features within the Earth system. The
community is invited to contribute digital imagery, short captions and
relevant links.


Archive - Colorful Leaf Layers

October 09, 2021

6a0105371bb32c970b01bb0949160c970d

Every weekend we present a notable item from our archives.

This EPOD was originally published October 25, 2016.

October 2016 Viewer's Choice Photographer: Sylvie Pighini
Summary Authors: Sylvie Pighini; Jim Foster

Shown above is a European beech ( Fagus sylvatica) in
Schönbrunn Park, Vienna, Austria, surrounded by its recently shed
leaves, which here are differentiated by color. While it's not uncommon
for a tree to have leaves of two color hues, it's odd that the
different colors are so stratified. In general, deciduous trees in
Europe show less color in autumn than their North American or Asian
counterparts. Reds are rather rare and yellow or gold is the
predominant color. Geography plays a major role in why this is the
case.

The emerald green of the grass strip separating the newly fallen leaves
from the first fallen ones is perhaps the most eye-catching color. In
the foreground at top the still green leaves of a maple can be seen.
Photo taken on November 23, 2014.

Photo Details: Nikon D3000 camera; AF-S DX Zoom-Nikkor 18-55mm
lens; f/3.5-5.6 G ED II; ISO 200; 55mm; ƒ/5.6; 1/30 sec.
exposure; Retouched using Lightroom.
* Schönbrunn Park, Austria Coordinates: 48.184516, 16.311865


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Plant Links

* Discover Life
* Tree Encyclopedia
* What are Phytoplankton?
* Encyclopedia of Life - What is a Plant?
* USDA Plants Database
* University of Texas Native Plant Database
* Plants in Motion
* What Tree is It?

-
Earth Science Picture of the Day is a service of the Universities
Space Research Association.

https://epod.usra.edu

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